What are the disadvantages of CS stabilized alkenyl succinic anhydride emulsion?

Low stability of cationic starch (CS) stabilized alkenyl succinic anhydride (ASA) emulsion is the main drawback of ASA sizing of paper to impart hydrophobicity.

What is alkenyl succinic anhydride?

Alkenyl succinic anhydride (ASA) is an alkaline sizing agent utilized normally in neutral/ alkaline practices in paper making [ 3 ]. It is basically an oily compound which is added to paper making stock in the form of emulsion at ambient temperature. ASA is created by the reaction of isomerized olefin with maleic anhydride.

What is alkenyl succinic anhydride (ASA)?

Alkenyl succinic anhydride (ASA) is commonly used to improve the water resistance characteristics of printing and writing paper in the neutral/alkaline paper-making process.

Why is alkenyl succinic anhydrie preferred for sizing cellulosic paper?

For the cellulosic paper and paperboards alkenyl succinic anhydrie (ASA) is preferred for sizing. The quick hydrolysis of ASA takes place because of the high reactivity of ASA in the presence of water molecules (Ding, Liu, & Zhao, 2011; Qian et al., 2013 ).

Can cationic polymers improve alkenyl succinic anhydride sizing efficiency in high-yield pulp?

"Using cationic polymers to improve alkenyl succinic anhydride (ASA) sizing efficiency in high-yield pulp containing furnish," BioRes. 7 (3), 3948-3959. High-yield pulp (HYP) such as bleached chemi-thermo-mechanical pulp (BCTMP) from aspen wood, is now being used in the production of high-quality fine papers, and this is particularly true in China.

How long does it take ASA emulsion to form alkenyl succinic acid?

ASA hydrolyses easily in aqueous emulsion to form alkenyl succinic acid, which is detrimental to sizing. Once prepared, ASA emulsion should be used within few minutes of time . ASA emulsion is prepared with cationic starch in different ASA to starch ratios.